Scarlet Spider, Kaine

Meant to be pitched and to keep crawling back, this design wires its two clauses to feed each other rather than compete for the same card. The enters trigger asks you to discard for a counter; Mayhem lets you recast from the graveyard for a single hybrid mana, but only if you discarded this card itself that turn. That last constraint is what keeps the loop clean instead of loose. The efficient line is to pitch him to some other outlet, buy him back for one mana, and let the enters trigger ask you to discard again. Discard stops reading as a cost and starts reading as fuel: the same graveyard trip that unlocks recursion sets up the next payoff. What the loop does not do is stack size. Each trip resets him, so every recast starts fresh as a 2/1 that can grow once, not a body that keeps swelling. What recurs is tempo, not stats. Menace is what makes the repeated pressure land, turning a small evasive threat into a clock a single blocker cannot answer. This is the black-red discard-matters shell compressed onto two mana: the color pair's long tradition of rummaging outlets and graveyard recursion given a body that wants to be thrown away. Without a way to fill the graveyard, the enters trigger is a one-shot pump and Mayhem never comes online; with one, the recast and re-trigger convert loose cards into recurring board presence.